Wire or thread whipping mechanism



june E7 I924.

B. E. BALDU F WIRE OR THREAD WHIPPING MECHANISM Filed June '7 1923 3Sheets-Sheet 1 5/21/ 0 In by W June 17 1924.

B. E. BALDUF wmz on THREAD WHIPPING mscmmsm 5 Sheets-Sheet 2 Filed June'7. 1923 June 17 1924- B. E. BALDUF WIRE 0R THREAD WHIPPING MECHANISMFiled June 7. 1923 3 Sheets-Sheet 5 [pl a m" Brayo Z". Bum f Patented mr7, tea.

BRUNO ENGELHARD BALDUF, OF CHICAGO, ILLINOIS, ASSIGNOR T0 WESTERN ELEC-TRIU COMPANY, INCORPORATED, OF NEW YORK, N, Y., A CORPORATION OF NEWWIRE 0R THREAD WHIPPING- MECHANISM.

, Application filed. June 7, 1923. Serial No. 643,865.

To all whom it may concern:

Be it known that l, Bruno ENoaLHAnn BALDUF, a citizen of the UnitedStates, residing at Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements in Wire orThread Whipping Mechanism, of which the following is afull, clear,concise, and exactdescri tion.

is application is a continuing applica tion in part of the ap licationfiled in the names of H. H. C. rondahl and B. E.

- Balduf, Serial No. 514,180, filed November llti lhis invention relatesto wire or thread whipping mechanism, and more particular ly to amechanism for whipping the ends of telephone cords with wire preparatoryto securing terminals thereto.

The ob'ect of the invention is to provide a mechanism whereb the ends ofcords may be whipped with wire with speed and accuracy and with aminimum of manual labor.

lfn accordance with the general features of this invention, there isprovided a whipping device which draws the wire guided from a supplysource and whips it about the end of a cord which is carried upon asupport which is automatically stepped back the desired distance foreach turn of Wire whipped onto the cord. Means are also provided forvarying the speed with which the cord support is stepped back during anoperation of the mechanism so that various diameter wires may be whippedin closed or open formation with the same mechanism, and also forreturning the operating parts of the mechanism to their startingposition after an operation. The cord support is equipped with meanswhereby a loop may be formed in the end of the wire and held during thewhipping operation. the loop thereafter being drawn taut for locking theend of the wire under the whipping.

The whipping device is provided with a severing surface to cut oif theexcess wire after the threading operation is completed and before thewhipping operation. The wire is drawn over the severing surface after itis passed around the loop forming means.

In the drawings illustrating the inventi n;

Fig. 2 is an enlarged fragmentary plan view thereof;

Fig. 3 is a vertical section taken on the line 33 of Fig. 2;

Fig. 4 is a fragmentary vation partly in section;

Fig. 5 is a plan section upon the line 5-5 thereof;

Fig. 6 is an enlarged fragmentary plan detail front eleview of thewhipping finger and the cord I support with the wire threaded and thecord indicated in position ready to have an end whipped Fig. 7 is a viewof the cord with an end whipped wlth wire and after removal from 1 themechanism, and

Fig. 8 is a view thereof in a finished condition.

As shown in Fig. 1, the machine is supported upon a bench or table 10with the main driving shaft 11 positioned below, which may be connectedto any suitable driving means (not shown). Carried upon a frame 13 androtatably mounted in bearings 14: and 15 thereon is a hollow shaft 16.Secured to one end of the shaft 16 is a friction ring 17 which forms thedriven art of a clutch 18, the engaging face of w ich is preferablyprovided with cork inserts indicated at 19. Slidable longitudinally uponthe shaft 16 and free to rotate thereon is a pulley 21 which forms thedrivingpart of the clutch 18 and is connected by a belt 22 passingthrough an opening 24 in the bench 10 to a similar pulley 25 securedupon the main driving shaft 11.

Pivotally secured at one end to a bracket 26 secured to the underside ofthe bench 10 is a lever 28 the opposite end of which is connected to asuitable foot treadle or other operating means (not shown) by a link 29.A spring 30, one end secured to the bench and its other end to the lever28, functions to return the lever 28 to its normal positionv after eachoperation thereof. A latch 31 pivotally secured at one end of the lever28 and passing upward through the opening 24 in the bench. engages a pin32 secured to a bellcrank lever 35 secured to one end of a pin 36 whichis rotatably mounted in bearings 37 upon the frame 13. The pin 36 at itsother end carries an arm 39 (see Fig. 2) which isthe same length as theshort arm 40 of the lever 35. Positioned between the short arm 40 of thelever 35 and the arm 39 and at their upper ends is a yoke member 41carried loosely upon a in 42 secured at either end to the upper en ofthe arms 39 and 40. The yoke member 41 straddles a sleeve portion 43 ofthe pulley 21, at the end of which is secured a collar 44. The long armof the bell-crank lever35 is fork shaped at its end and is pivotallysecured to a movable post 47 by a pin 48 (see Figs. 1 and 3).

The post 47 in its movement 1s guided in a cup-like member 49 suitablysecured to the frame 13. Carried within the cup 49 between the insidelower surface and a shoulder formed on the post 47 is a spring 50. Areduced end 51 of the post 47 extends through the cup 49 and hasthreaded thereon a set of adjusting nuts 53. Clamped to the upper end.of the post 47 is a stop arm 54 which extends inwardly toward the axisof the shaft-16 and engages a lug 55 formed on the eri heral surface ofthe friction ring 17. ee igs. 1 and 3.) A leaf spring 56 secured to theunderside of the stop arm 54 is shaped at its free end to allow the lug55 on the ring 17 to be locked behind a shoulder 57 formed on the spring56 and the end of the stop arm 54. The function of the stop arm 54 andthe spring 56 carried thereby is to stop the friction ring 17 and theshaft 16 secured thereto in the same 0- sition after each operation. Aleaf spring 58 bearing against an adjustable screw 59 secured in the endof the latch 31 functions to hold the latch in looking engagement withthe pin 32 in the lever 35 when the mechanism is in its initialposition, as shown in the drawings.

Formed upon the shaft 16 intermediate the bearings 14 and 15 is a worm60 which meshes with a worm wheel 61 loosely carried upon a shaft 62positioned below the shaft 16 and rotatable in the bearings or supports63 and 64. -The worm wheel 61 forms the driving part of the clutch 65and is adapted to be engaged by a driven member 66 secured to the shaft62. but slidable thereon (see Fig.3). Pivotally secured to a fork formedupon the yoke member 41 directly below the shaft 16 by a pin 70 is alink 71 (see Fig. 1). The link 71 is forked at its other end asindicated at 72 and has pivoted thereon by a pin 73 a bell-crank lever74 which at its other end 75 is yoke shaped. The bell-crank lever 74 ispivoted at 78 to the frame 13 and its yoked end 75 straddles a sleeveportion 79 integral with the driving member 66 and positioned betweencollars suitably secured thereon. Upon one end of the shaft 62 issecured a distribu g m .80 which is eng g by cam roller 81 carried uponan arm 82 pivlatch 31 after the conductor support 87 has.

moved back the desired amount. The movement of the striker 88 againstthe latch 31 disengages it from the pin 32 in thebellcrank lever 35 andthrough the spring 50 the long arm of-the lever 35 is moved upward,which movement through the associated arms, link and lever disengagesthe clutches 18 and 65,- thereby stopping the machine. The striker 88 isadjustably mounted upon the guide rod 86, so that the length of whippingput on conductors may be varied as desired.

The distributing cam is provided with a slot 91 in line with its pivot85, within which rides a roller 92 suitably supported from an adjustingnut 93 adjustable vertically in a guideway 94 formed in the conductorsupport 87 by an adjusting screw 95.-

port 87 in moving rearward can be varied,

and consequently the number of turns of wire whipped onto the conductorin an operation will be varied, by moving the roller 92 up or down inthe slot 91. The movement of the arm 82 is the same at all times, but itwill be readily seen that by increasing the distance between the axis ofthe roller 92' and the pivot of the arm 82 the. speed of the support 87in moving rearward will be increased and vice versa. A suitable scale100 is marked upon the arm 82 to assist the operator in setting theroller 92 in the slot 91 so that the support will move at the desiredspeed. Secured in the support 15 is a guide pin 101 upon which theconductor support is moved and guided in its movement. Surrounding theguide rod 86 between the support 15 and a collar 102 secured upon therod 86 and resting against the support 14 is a compression spring 103which functions to return the conductor support 87 to its initialposition after each operation. The support 15 is hollowed out asindicated at 104 (see Fig. 3) and within it is housed a clock spring 108which is coiled around the shaft 62 with one end secured thereto asshown at 109 and its other end fastened to a pin 110 secured in thesupport" pens before the cam 80 has made a complete revolution, therebypreventing any damage to the machine. A pin 111 carried by the cam 80engages a stationary stop 112 upon the return movement of the cam 80,thereby causing the cam to be brought to a stop in the sameosition-after each operation.

A supp y of Wire 114 to be whipped around the ends of the conductor iscarried on a spool 115 freely rotatable upon a bracket 116 secured tothe rear end of the frame 13. Mounted upon a platform 117 forming a partof the bracket 116 is an adjustable guide in 118 provided with anopening 121 throug o ening 121 in the guide pin 118 is in line with theaxis of the hollow shaft 16 through ""which the wire is threaded. A pairof spring tension fingers 119 engages the wire 114 upon opposite sidesthereof after leaving the gui e pin 118 to put a certain tension uponthe wire as it is drawn from the su plyspool. A thumb screw 120 is provied to center the fin ers in line withthe opening in the guide pm 118 andthe opening through the shaft 16.

To that end of shaft 16 which projects outside of the bearin 63 issecured a whipping head 125. As s own in the drawings, the mechanism isin its normal position with the head 125 brought to a standstill afteran operation by the engagement of the lug 55 with the stop arm 54.Formed on the whip ing head 125 is a whipping finger 126 whicfi extendsforward of the whipping head 125 and has an end 127 substantiallyU-shaped in cross section and the hollow of which is coincident with theaxis of the shaft 16. Mounted upon the whipping finger 126 below theU-shaped section and a trifle to one side of the axial line of the shaft16 is a roller 128 (see Figs. 1 and 2). The inside end of one side ofthe whipping finger 126 is shaped as indicated at129 to form a knifeedge, the purpose of which will be described in the description of theoperation of the machine. Passages 131 and 132 are formed inthe whippingfinger 126 in line with the roller 128 for the passage of the wire 114before reaching and after leaving the roller 128.

Suitably pivoted to the frame 13 are the cover members 138 and 139 whichserve to enclose the greater part of the mechanism.

The operation of this mechanism is as 'follows In the drawin themechanism is shown in its normal posltion with the wire threaded fromthe supply spool through the hollow shaft 16 and the passages 131 and132 in the whipping finger 126 and the guide roller 128 carried thereonand then looped around a pin 134 in the conductor support 87 and thenover the knife edge 129 on the whipping fi g 2 By p ssi g t e Wire r hewhich the wire is guided. The' knife edge after it is looped around thepin 134 and exerting a slight pull on it the placed with its endprojecting a suitable distance into the U-sha-ped formation of thewhipping finger 126. Upon a depression of the foot treadle the frictionring 17 of the clutch 18 is freed from the retaining spring 50 andimmediately thereafter the driving member 21 of the clutch 18 is movedinto engagement with the friction ring 17.

Immediately after the clutch 18 is engaged the clutch 65 is also engagedand the cam 80 is set in motion in the direction indicated by the arrowin Fig. 1. The whipping finger 126 being carried by the shaft 16, it isset in motion upon the engagement of the clutch 18 and as the cam 80moves the conductor support 87 with the conductor thereon rearward, thewhipping finger I 126 wraps the wire around the end of the conductor ina spiral formation. The striker 88, being adjusted on the rod 86 theproper distance from the latch 31 so as to disengage it from the pin 32on the bell-crank lever 35 when the conductor support 87 has moved thedesired distance rearward, comes into engagement with the latch 31 andfrees it from the pin 32. This causes the long arm of the bell-cranklever 35 to move up- Ward, due to the spring 50, and thereby disengagesthe clutches 18 and 65, bringing the shafts 16 and 62 to a standstill.

The clock spring 108 secured to the shaft 62 functions to return the cam80 to its initial position against the stop 112 upon the disengagementof the clutch 65. The stop arm 54 and the spring 56 carried thereb uponthe movement upward of the post 4 when the latch 31 is disengaged act tostop the shaft 16 and the whipping head and finger carried thereon intheir initial position, as shown in the drawings, with the whippingfinger 126 in an up position ready for the insertion of the end of thenext conductor to be whipped. Upon the disengagement of the latch 31 andthe pin 32 the operator releases the foot treadle which allows thespring 30 to move the lever 28 and the latch 31 secured thereto to theirnormal position.

Upon the stopping of the mechanism the operator picks up the conductorfrom the whipping finger, which operation draws a short length of wirefrom the supply spool and cuts it off close to the whipped end, as

looped around the pin 134 and then over the knife edge 129 and then cutof! ready for the followin operation.

What is c aimed is:

1. In a mechanism for whipping the ends of cords with wire, means forwhlppingthe wire around the end of the cord, a support for the cord,means for stepping back said support during the whipping operation tocause the wire to be whipped about the cord in a spiral formation, meansfor returning said mechanism to its starting position after an operationthereof, and mechanism controlled by one of said means for causing theactuation of said returning means.

2. In a mechanism for whipping the ends of cords with wire, means forwhipping the wire around the end of the cord, a support for the cord,means for stepping back said support during the whip ing operation tocause the wire to be w ipped about the cord in a spiral formation, meansfor returning said mechanism to its starting position after an operationthereof, and mechanism controlled by said stepping means for causing anactuation of said returning means. a

3. In a mechanism for whipping the ends of cords, a material supplyreel, means for drawing the material from said supply reel and whlppingit about the end of the cord, a movable support for the cord, means forstepping back said support during the whippin operation to cause thematerial to be w 'pped about the cord in a spiral formation, means forvarying the speed at which said support is stepped back whereby materialof various diameters may be whipped in open or closed formation, meansfor returning said mechanism to its starting position after an operationthereof, and mechanism controlled by one of said means for causing anactuation of said returning means.

4. In a mechanism for whipping the ends of cords with wire, a wiresupply reel, means for drawing the wire from said supply reel andwhipping it about the end of the cord, a support for the cord, means forstepping back said support during the whipping operation, means forvaryin the speed at which said support is stepped ack whereby variousdiameters of wires may be whipped in open and closed formations, meansfor returning said support to its starting position after a whippingoperation, and mechanism controlled by said stepping means for causingan actuation of said returning means.

5. In a mechanism .for whipping the ends of cords with wire, means fordrawing the wire from a supply and whipping it about the cord, alongitudinally movable support for the cord, cam operated means forstepping said support back during the whipping operation, andmeans forreturning said support and cam operated means to their startlng positionafter a whipping operation.

6. In a mechanism for whi ping a core with a strand, means for w hippingthe strand around the core, a support for the core, means for causingrelative movement between said support and the whippin means to causethe strand to be whipped around the core in a spiral formation, meansfor establishing the original relation between the support and thewhipping means, and mechanism controlled by one of said means forcausing an actuation of the last mentioned means.

7. In a mechanism for Whipping a core with a strand, means for whippingthe strand around the'core, a support for the core, means for movingsaid support relative to the whipping means to cause the strand to bewhipped around the core in a spiral formation, means for returning saidsupport to its starting position after an operation thereof, andmechanism controlled by one of said means for causing an actuation ofsaid last-mentioned means.

8. In a mechanism for whipping the ends of cores with a strand, meansfor whipping the strand around the core, a support for the core, meansfor causing relative movement between said support and the whippingmeans whereby the strand is whipped about the core in spiral formation,means for establishing the original relation between said support andthe whipping means, and mechanism controlled by said first-mentionedmeans for causing the actuation of said last-mentioned means.

9. In a mechanism for whipping a core with a strand, means for whippingthe strand around the core. a support for the core, means for causingrelative movement between the support and the whippin means to cause thestrand to be whippe about the core in a spiral formation, means forvarying the speed at which the last-mentioned means operates wherebystrands of various diameters may be whipped in open and closedformations, means for establishing the original relation between thesupport and the whipping means, and mechanism controlled by one of saidmeans for causing an actuation of said last mentioned means.

10. In a mechanism for whipping the ends of cores with a strand, meansfor whipping the strand around the end of the core, a support for thecore, means for causing relative movement between said support and thewhipping means whereby the strand will be whipped around the core in aspiral formation, means for establishing the original relation betweensaid support and the whipping means, a trip mechanism for causmg anactuation of said last-mentioned tripping mechanism.

11 In a mechanism for whi ping a core with a strand, means for w ippmgthe strand around the core, a support for the core, means for causingrelative movement between said support and the whippin means whereby thestrand will be whlppe about the core in a spiral formation, spr noperated means for establishing the original relation between saidsupport and the whipping means, said spring being placed under tensionby an operation of said. firstmentioned means, and a trip mechanismcontrolled by one of said means for causing said spring to operate.

12. In a mechanism for wh1 ping a core with a strand, means for w ipplngthe strand around th core, a support for the core, means for causingrelative movement between said support and the whippin means whereby thestrand will be whippe' about the core in a spiral formation, springoperated means for establishing the on 1- nal relation between saidsupport and t e whipping means, said spring being placed under tensionby an operation of said firstment-ioned means, a trip mechanism forcausing said sprin to operate, and mechanism controlled y saidfirst-mentioned means for actuating said trip mechanism.

13. In a mechanism for whipping core, a material supply, means forrawing the material from said supply and guidrng and whipping it aroundthe core comprlsm a fin er provided with a depression wit in WhlCh thecore is positioned, means for automatically causing said finger to bereturned to its starting position after the whipping operation, a suport for the core, and means for causing re ative movement between thecore and said finger whereby the material is whipped around the core ina spiral formation.

14.. In a mechanism for whipping a core, a material supply means fordrawing the material from sald supply and guiding and whipping it aroundthe core comprisingl a finger rovided with a depression wit in which t ecore is positioned, means for automatically causing said fin r to bereturned to its starting position a er the whipping operation, a supportfor the core, means for causing relative movement between the core andsaid finger whereby the material is whi ped around the core in a spiralformatlon, and means'for automatically establishing the originalrelation between the support and said finger. I

15. In a mechanism for whippin a core with a strand, a material supplree means for drawing material from sai supply reel and guiding andwhipping it around the end of the core comprising a finger provided witha depression in which the end of the core is positioned, means forcausing said finger to be returned to its starting position after thewhipping operation,

a support for the core adapted to he stepped back during the whippingoperation, means for. returning said support to its startin positionafter an operation thereof, an mechanism controlled by one of said meansfor causingan actuation of said last-mentioned means.

16. In a 'mechanism for whipping the ends of cords, a material wiresupply reel,

means for drawingthe material from said supply reel and guiding andwhipping it about the end of the cord comprising a fin er provided with.a depression within WhlCh the end of the cord is'positioned, means forcausing said finger to be returned to its starting position after awhipping operation, a support for the cord adapted to he stepped backduring the whipping operation, means for establishing the ori inalrelation between the support and t e whipping means, and mechanismcontrolled by one of said means for causing an actuation of thelast-mentioned means.

17. Ina mechanism for whipping the ends of cords with wire, a materialsupply reel, means for drawing the material from said supply reel andwhipping it about the end of the cord comprising a revolvable fin erprovided with ide openings and a guide member for guiding the wire intoposition for whipping about the cord; means for causing said finger tobe returned to its starting position after a whipping operation, asupport for the cord adapted to he stepped back during the whippingoperation, means for establishing the original relation between thesupport and the whippin means, and mechanism controlled by one 0 saidmeans for causing an actuation of the last-mentioned means.

18. In a mechanism for whipping the ends of cords, a material wiresupply reel, means for drawing the material from said supply reel andguidin and whipping it about the end of the cor comprising a fin er pro-.vided with a depression within w ich the end of the cord is positioned,means for causing said finger to be returned to its startingpositionafter a whipping operation, a support for the cord adapted to he steppedback during the whipping operation, means for establishing the originalrelation between said support and the whipping means, and mechanismcontrolled by said firstmentioned means for causing an actuation of saidlast-mentioned means.

19. In a mechanism for whipping a core with a strand, means for whippingthe strand around the core comprising a rotatable element, a support forthe core, means, for causing relatlve movement between said support andthe whipping means to cause the strand to be whipped around the core 1na spiral formation, means for causing said whipping means to be returnedto its starting position after a 'whipping operation, sald meanscomprising an element for ar resting the rotation of said rotatableelement at a predetermined point, means for establishing the originalrelation between the support and whipping means, and mechanismcontrolled by one of said means for causing an actuation of thelast-mentioned means.

20. In a mechanism for whipping a core with a strand, mean for whippingthe strand around the core including a rotatable ele ment having, aprojection thereon, a support for the core, means for causing relativemovement between the said support and the whipping means to cause thestrand to be whipped around the core in a spiral formation, means forcausing said whipping means to be returned to its starting positionafter a whipping operation, said means comprising a spring pressed latchfor engaging said projection on the rotatable element, means forestablishing the ori 'nal relation between the support and t e whippingmeans, and mechanism for controlling one of said means for causing anactuation of said last-mentioned means.

In witness whereof, I hereunto subscribe my name this 2nd day of June,A. D.,' 1923.

BRUNO ENGELHARD BALDUF.

